Maybe....Maybe not......I found this while watching the video posted by GM on a prototype for SEMA...
It say's wheel size 20 x 10 and 20 x 11via Z/28 blanks...check what's written under suspension in the video.
Zoom in at 2:03 of the video below:

It shows a polished picture of the wheel also in the video, it could very well be our wheel. Now if we could only get a better close up. Any one who went to sema has any close up of the info board that was out at the media day @ spring mountain with pics to share?